The effect of compression on the crystallization behavior and corrosion resistance of Al(86)Ni9La5 amorphous ribbons was investigated by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning elec-tron microscopy (SEM) and electrochemistry test. The XRD and TEM results reveal that the compressed Al(86)Ni9La5 ribbons spun with the circumferential speed (R) of 29.3 m/s are in fully amorphous state; however, the compressed ribbons spun with R=14.7 m/s have crystalline phases embedded in the amorphous matrix. The SEM images indicate that after compression, the toughness of the ribbons increases. Electrochemical results show that the compression decreases the stability of the passive film of the Al(86)Ni9La5 amorphous ribbons, because of the compression-introduced free volume, shear bands and crystalline phases; meanwhile, with R=14.7 m/s, the compression-induced crystalline phases in the Al(86)Ni9La5 ribbons increase the corrosion potential.
参考文献
| [1] | F. YE;K. LU .PRESSURE EFFECT ON CRYSTALLIZATION KINETICS OF AN AI-La-Ni AMORPHOUS ALLOY[J].Acta materialia,1999(8):2449-2454. |
| [2] | N. Boucharat;R. Hebert;H. Rosner .Nanocrystallization of amorphous Al_(88)Y_7Fe_5 alloy induced by plastic deformation[J].Scripta materialia,2005(7):823-828. |
| [3] | W. H. Jiang;M. Atzmon .The effect of compression and tension on shear-band structure and nanocrystallization in amorphous Al_(90)Fe_5Gd_5: a high-resolution transmission electron microscopy study[J].Acta materialia,2003(14):4095-4105. |
| [4] | J.Q. Wang;H.W. Zhang;X.J. Gu .Kinetics of primary nanocrystallization in Al-rich metallic glass with quenched-in nuclei[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):980-984. |
| [5] | N. Boucharat;H. Rosner;G. Wilde .Development of nanocrystals in amorphous Al-alloys[J].Materials science & engineering, C. Biomimetic and supramolecular systems,2003(1/2):55-59. |
| [6] | C. H. Shek;G. He;Z. Bian .Effect of composition and cooling rate on structures and properties of quenched or cast Al-V-Fe alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):20-26. |
| [7] | B.P. KANUNGO;S.C. GLADE;P. ASOKA-KUMAR .Characterization of free volume changes associated with shear band formation in Zr- and Cu-based bulk metallic glasses[J].Intermetallics,2004(10/11):1073-1080. |
| [8] | J. Jayaraj;A. Gebert;L. Schultz .Passivation behaviour of structurally relaxed Zr_(48)Cu_(36)Ag_8Al_8 metallic glass[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):257-261. |
| [9] | S.D. Zhang;Z.M. Wang;X.C. Chang;W.L. Hou;J.Q Wang .Identifying the role of nanoscale heterogeneities in pitting behaviour of Al-based metallic glass[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2011(9):3007-3015. |
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